Buggy code:
public class XMPPChatRoomContainer extends ClientSOContainer implements IChatRoomContainer { private static final String CONTAINER_HELPER_ID = ( XMPPContainer . class . getName ( ) ) + ".xmppgroupchathandler" ; protected ID containerHelperID ; protected XMPPChatRoomContainerHelper containerHelper ; protected MultiUserChat multiuserchat ; protected Namespace usernamespace = null ; public XMPPChatRoomContainer ( ISharedObjectContainerConfig config , ECFConnection conn , Namespace usernamespace ) throws IDCreateException { } public XMPPChatRoomContainer ( ECFConnection conn , Namespace usernamespace ) throws IDCreateException { } public void dispose ( ) { } protected void sendMessage ( ContainerMessage data ) throws IOException { } protected void handleChatMessage ( Message mess ) throws IOException { } protected boolean verifyToIDForSharedObjectMessage ( ID toID ) { } public void handleContainerMessage ( ContainerMessage mess ) throws IOException { } protected void handleIQMessage ( IQ mess ) throws IOException { } protected void handlePresenceMessage ( Presence mess ) throws IOException { } protected void handleChatMembershipEvent ( String from , boolean add ) { } protected void handleXMPPMessage ( Packet aPacket ) { try { if ( aPacket instanceof IQ ) { handleIQMessage ( ( ( IQ ) ( aPacket ) ) ) ; } else if ( aPacket instanceof Message ) { handleChatMessage ( ( ( Message ) ( aPacket ) ) ) ; } else if ( aPacket instanceof Presence ) { handlePresenceMessage ( ( ( Presence ) ( aPacket ) ) ) ; } else { debug ( ( "got<seq2seq4repair_space>unexpected<seq2seq4repair_space>packet<seq2seq4repair_space>" + aPacket ) ) ; } } catch ( IOException e ) { <START_BUG> logException ( "Exception<seq2seq4repair_space>in<seq2seq4repair_space>handleXMPPMessage" , e ) ; <END_BUG> } } protected XMPPConnection getXMPPConnection ( ) { } protected void addSharedObjectToContainer ( ID remote ) throws SharedObjectAddException { } protected void cleanUpConnectFail ( ) { } public Namespace getConnectNamespace ( ) { } public void connect ( ID remote , IConnectContext connectContext ) throws ContainerConnectException { } public void disconnect ( ) { } protected SOContext createSharedObjectContext ( SOConfig soconfig , IQueueEnqueue queue ) { } protected ID createChatRoomID ( String groupName ) throws IDCreateException { } protected ISynchAsynchConnection createConnection ( ID remoteSpace , Object data ) throws ConnectionCreateException { } public IChatRoomMessageSender getChatRoomMessageSender ( ) { } public void connect ( String groupName ) throws ContainerConnectException { } public void addChatRoomParticipantListener ( IChatRoomParticipantListener participantListener ) { } public void removeChatRoomParticipantListener ( IChatRoomParticipantListener participantListener ) { } public void addMessageListener ( IIMMessageListener listener ) { } public void removeMessageListener ( IIMMessageListener listener ) { } public void addChatRoomAdminListener ( IChatRoomAdminListener subjectListener ) { } public void removeChatRoomAdminListener ( IChatRoomAdminListener subjectListener ) { } }

Fix:
traceStack ( "Exception<seq2seq4repair_space>in<seq2seq4repair_space>handleXMPPMessage" , e ) ;